echo $?可以获取上一条命令的exit code。 但是如果bash脚本中设置了set -e,那么如果命令的exit code不为0,当前bash脚本会直接退出。这种情况下如果要获取命令的exit code而不退出,需要让该命令在一个新的shell中执行: set -e ret=$(bash -c 'bash test2.sh; echo $?') echo $ret...
echo “Command failed with exit code: $exit_code” fi “` 在这个例子中,我们使用了ls命令来示范。脚本首先执行ls命令,然后使用$?获取ls命令的返回值并将其赋值给变量exit_code。接下来,使用if语句判断exit_code的值,如果等于0,则打印”Command executed successfully”,否则打印”Command failed with exit code...
=0结束时返回退出代码!=0？EN// 释放pcb的一页内存，重新调度进程 void release(struct task_struct ...
(If n is omitted, the exit status is that of the last command executed. ) 格式:$? 上一个命令的退出码。 格式:trap "commands" EXIT 退出时执行commands指定的命令。( A trap on EXIT is executed before the shell terminates.) 退出码(exit status,或exit code)的约定: 0表示成功(Zero - Success...
在~/.bashrc文件末尾添加如下代码 function git_branch { branch="`git branch 2>/dev/null | ...
exit 1 fi With files #!/bin/bash touch ab c d e for i in a b c d e; do cat $i if [[ $? -ne 0 ]]; then fail=1 fi done if [[ $fail == 1 ]]; then exit 1 fi 特殊参数$?保存最后一个命令的退出值。大于0的值表示失败。所以只需将其存储在一个变量中,并在循环后检查它...
To produce an errant exit status of 0: $bash$exit256exit$echo$?0 If you use 257 as the exit code, your exit status is 1, and so on. If the exit code is a negative number, the resulting exit status is that number subtracted from 256. So, if your exit code is 20, then the ex...
(STOPPABLE, NOT_PAUSABLE, IGNORES_SHUTDOWN) WIN32_EXIT_CODE : 0 (0x0) SERVICE_EXIT_CODE : 0 (0x0) CHECKPOINT : 0x0 WAIT_HINT : 0x0 PID : 0 FLAGS : 如果sc start null 启动成功。就可以解决问题了,再启动git bash,闪退问题解决。
While ShellCheck is mostly intended for interactive use, it can easily be added to builds or test suites. It makes canonical use of exit codes, so you can just add ashellcheckcommand as part of the process. For example, in a Makefile: ...
# 假设在终端输入 bash bash_tutorial.sh -a 1 -b 2 -c yes a=0; b=0; c="zero" # 变量初始化, 一行定义多个变量, 通过 ';' 分割开 # 定义函数提示正确用法 usage() { echo "Usage: bash $0 -a <a_meaning> -b <b_meaning> [-c <c_meaning>]" # '[ ]' 表示参数可选 exit 1 }...